The heritage masonry portion of the piers was drilled with non-percussive rotary drilling, while the mass concrete and rock portions of each hole were drilled with down-the-hole hammer. All 103 rock anchors consisted of 75mm/1030MPa threadbar tendons grouted into 178mm diameter holes.

Additionally, each anchor was encapsulated in a woven geo-textile bag to prevent loss of grout into inersected fissures and masonry joints. The longest rock anchors, at Pier 2, measured 39 metres from top of pier (45 metres from bridge deck).

With the river doubling as the border between two provinces, Keller incorporated a new company, Les Entrepreneurs Geo-Foundations to perform the half of the project located in Quebec.